package com.zyw.srsb.bulletin.util;

import javax.servlet.http.HttpServletRequest;

/**
 * @author 朱耀威
 * @Date 2022/2/3
 */
public class IPUtils {
   public static String getRealIP(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
       if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) {
            // 多次反向代理后会有多个ip值，第一个ip才是真实ip
			             if( ip.indexOf(",")!=-1 ){
				                ip = ip.split(",")[0];
				            }
			        }
	   if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			             ip = request.getHeader("Proxy-Client-IP");
			            System.out.println("Proxy-Client-IP ip: " + ip);
			        }
	   if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			             ip = request.getHeader("WL-Proxy-Client-IP");
			            System.out.println("WL-Proxy-Client-IP ip: " + ip);
			         }
		         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			             ip = request.getHeader("HTTP_CLIENT_IP");
			             System.out.println("HTTP_CLIENT_IP ip: " + ip);
			         }
		         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			             ip = request.getHeader("HTTP_X_FORWARDED_FOR");
			             System.out.println("HTTP_X_FORWARDED_FOR ip: " + ip);
			         }
		         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			             ip = request.getHeader("X-Real-IP");
			             System.out.println("X-Real-IP ip: " + ip);
			         }
		         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			             ip = request.getRemoteAddr();
			             System.out.println("getRemoteAddr ip: " + ip);
			         }
		         return ip;
		     }
 }